3 Fat-Frying Cardio Routines

Unlike the elliptical, where it's easy to slack off (and you zap three fewer calories a minute), the revolving staircase forces you to keep moving, Coopersmith says. Practice good form: Lightly grip handlebars, and stand tall.

STAIR SUMMITYou'll climb steadily for the first 15 minutes; then, like topping a real peak, it's all downhill from there.